For the tuners out there....this would not be a hard gun to modify for 35fpe in 177 if you got the balls to do it. However, 22-23fpe with that accuracy I think id leave it alone. At 80 yards its got more energy than most piston guns at the muzzle. Porting is pretty tiny, probe is bigger than my 30 slug shooters, low reg pressure, etc. Id also like to add the 12.5gr nsa came in at 895-899fps but werent quite as accurate. About 1.1” at 80 yards. Still great though! One feature I like is the power adjuster. In .177 it drops to 4fpe and is great to adjust the trigger it uses almost no air. Ive been shooting on low power all morning with hobby pellets for more trigger time with the gun. So as of now, I highly reccomend this gun for anyone who wants a little .177